Make tests fail when they log errors (#1027)

To ensure that callback failures don't sneak through in testing.

Also to ensure we aren't crowding users' consoles during normal
operation.

Author: EzraBrooks

package-lock.json

@@ -35,7 +35,8 @@
     "vite": "^7.0.0",
     "vite-plugin-checker": "^0.11.0",
     "vite-plugin-dts": "^4.0.2",
-    "vitest": "^4.0.3"
+    "vitest": "^4.0.3",
+    "vitest-fail-on-console": "^0.10.1"
   },
   "dependencies": {
     "@xmldom/xmldom": "^0.9.8",

package.json

@@ -0,0 +1,5 @@
+import failOnConsole from "vitest-fail-on-console";
+
+failOnConsole({
+  shouldFailOnWarn: false,
+});

test/setup/per-suite-setup.ts

@@ -43,7 +43,8 @@ export default defineConfig({
   test: {
     include: ["{src,test}/**/*.{test,spec,example}.?(c|m)[jt]s?(x)"],
     exclude: ["dist"],
-    globalSetup: "./test/setup/vitest-setup.js",
+    globalSetup: "./test/setup/vitest-setup.ts",
+    setupFiles: "./test/setup/per-suite-setup.ts",
     projects: [
       {
         extends: true,